JP3290872B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner provided with a control circuit for keeping the input of an electric blower constant.

[0002]

2. Description of the Related Art As a conventional example in which the suction force can be controlled, there is an electric vacuum cleaner disclosed in Japanese Patent Laid-Open No. 5-95877.
This vacuum cleaner is, as shown in FIG.
Current sensor 101 for detecting zero current, full-wave rectifier 10
Current detection circuit 10 composed of two and smoothing capacitor 103
4, an amplifying circuit 106 including an operational amplifier 105 for amplifying the output of the current detection circuit 104, and an electric blower 10
A phase control circuit 107 for controlling the number of rotations of 0 and a microcomputer 109 are provided. The microcomputer 109 controls the AC power source 1 by the phase control circuit 107 based on the output of the amplification circuit 106 so that the current supplied to the electric blower 100 becomes constant.
The 08 phase firing angle is controlled. As a means for stopping the power supply to the motor for driving the rotary brush, a device having a structure in which a microswitch is provided in the suction port and the switch is turned off when the suction port is separated from the floor surface is generally used. Are known.

[0003]

According to the above-mentioned prior art, the amount of air to be sucked is reduced due to the start of cleaning by placing the suction port on a carpet or the change in the amount of dust in the dust bag, and the load on the electric blower 100 is reduced. When it becomes light, the current value decreases.
The current detection circuit 104 and its amplification circuit 106 capture this subtle current change. Since the operational amplifier 105 of the amplifier circuit 106 is an inverting amplifier, the output signal increases. Therefore, the microcomputer 109 increases the phase firing angle so as to increase the current value of the electric blower 100, and attempts to restore the current value of the electric blower 100 to the original value.

[0004] The phase firing angle is accelerated when dust is in the dust collecting bag, but when cleaning is completed and cleaning is started again, the current value of the electric blower is again detected at a certain phase firing angle by the current detection circuit. There is a problem that it is necessary to perform the detection again, and it takes time to make the input constant. Further, there is a problem that the dust collection efficiency does not increase much only by controlling the input of the electric blower. Furthermore, the function of stopping the rotating brush when the suction port body separates from the floor is necessary for the safety of the user, but since a micro switch is required,
There is a problem that it becomes expensive.

An object of the present invention is to obtain an optimum input of an electric blower for a dust collection amount in a short time from the start of operation.
Another object is to provide an inexpensive vacuum cleaner having improved dust collection efficiency.

[0006]

According to a first aspect of the present invention, there is provided an electric blower provided in a main body of a vacuum cleaner, a current detection circuit for detecting a current flowing through the electric blower, and an alternating current supplied to the electric blower. Blower phase variable circuit for varying the phase firing angle of the power supply, storage means for storing the phase firing angle immediately before the operation of the electric blower ends, and control for controlling the phase of the electric blower via the blower phase variable circuit And a circuit. The control circuit, when starting the operation of the electric blower, reads a phase firing angle from the storage means, as a phase firing angle of the blower phase variable circuit,
The phase firing angle of the blower phase variable circuit is varied so that the supply current to the electric blower is constant based on the output of the current detection circuit.

According to a second aspect of the present invention, there is provided a vacuum cleaner in which a switch for resetting information stored in the storage means is added to the configuration of the vacuum cleaner according to the first aspect. This control circuit
When the reset switch is pressed, the operation of the electric blower is started at a predetermined initial phase firing angle without reading the phase firing angle from the storage means.

[0008] The invention of claim 3 is claim 1 or claim 2.
In addition to the above configuration, the rotating brush provided in the suction port body, a rotating brush motor for driving the rotating brush, and a phase firing angle of an AC power supply supplied to the rotating brush motor are varied. A vacuum cleaner comprising: a brush phase variable circuit; and a control circuit that controls the phase of the rotating brush via the brush phase variable circuit. The control circuit includes:
When the output of the current detection circuit is larger than a set value, the phase firing angle is controlled so as to reduce the rotation speed of the rotating brush, and when the output of the current detection circuit is smaller than a target value,
The phase firing angle of the brush phase variable circuit is varied so as to increase the rotation speed of the rotating brush.

[0009] The invention of claim 4 is the invention of claim 1 or claim 2.
In addition to the above configuration, the rotating brush provided in the suction port body, a rotating brush motor for driving the rotating brush, and a phase firing angle of an AC power supply supplied to the rotating brush motor are varied. A brush phase variable circuit and the brush position
When controlling the phase of the rotating brush via a phase variable circuit,
And a control circuit for controlling rotation and stop of the rotating brush. The control circuit comprises:
If the output of the current detection circuit is larger than the set value,
The phase firing angle is controlled so as to reduce the number of rotations of the brush.
If the output of the current detection circuit is smaller than the target value,
The brush phase variable rotation speed is increased so as to increase the rotation speed of the rotation brush.
Variable the phase firing angle of the road to control the phase of the rotating brush,
The rotation / stop control calculates a difference between the current value of the current value of the current detection circuit and the current value of the current measurement value. If the absolute value of the difference exceeds a set value, the rotation brush is determined if the difference is positive.
Rotate, if negative, stop the rotating brush, so that when the suction port body is in contact with the floor, the rotating brush rotates, and when away from the floor, the rotating brush stops, and the difference If the absolute value of does not exceed the set value, the operating state of the rotating brush is maintained.

According to a fifth aspect of the present invention, there is provided an electric blower provided in the main body of the vacuum cleaner, a current detection circuit for detecting a current flowing through the electric blower, and a phase firing angle of an AC power supply supplied to the electric blower. A variable phase of the blower, a rotating brush provided in the suction port, a rotating brush motor for driving the rotating brush, and a phase firing angle of an AC power supply supplied to the rotating brush motor. A vacuum cleaner comprising: a variable brush phase circuit; and a control circuit that controls the phases of the electric blower and the rotating brush via the blower phase variable circuit and the brush phase variable circuit. The control circuit varies a phase firing angle of the blower phase variable circuit so that a supply current to the electric blower becomes a set value based on an output of the current detection circuit, and an output of the current detection circuit is a set value. If greater, the phase firing angle is controlled so as to reduce the rotation speed of the rotating brush, and if the output of the current detection circuit is smaller than a target value, the brush phase variable circuit is configured to increase the rotation speed of the rotating brush. Is varied.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a vacuum cleaner according to the present invention will be described in detail with reference to the drawings.

<Overall Configuration of Vacuum Cleaner> FIG. 1 is a sectional view showing the overall configuration of a vacuum cleaner to which the present invention is applied. FIG. 2 is a perspective view showing a pipe configuration of the vacuum cleaner. A suction port 4 is formed in the front part of the vacuum cleaner main body 3 composed of the upper main body 1 and the lower main body 2, an electric blower 5 is provided in the cleaner main body 3, and between the electric blower 5 and the suction opening 4, A dust collecting chamber 8 is provided for accommodating a dust collecting bag 7 attached to the mount 6, and a clamp 12 for attaching and detaching the dust collecting bag 7 to and from the dust collecting chamber 8 is provided.
Is installed. Above the electric blower 5, a control circuit section 9 in which electronic components and the like are mounted on a circuit board is provided. A cover 10 is provided on the front of the upper body 1 to replace the dust bag 7.
Are provided to be freely opened and closed. Note that a pair of left and right wheels 11 rotatably provided on the lower main body 2 is attached.

A suction hose 15 is detachably attached to the suction port 4 via a main body pipe 13, and a hand pipe 14 is connected to an end of the suction hose 15 on the opposite side. As shown in FIG. 2, a suction port 17 is connected to the hand pipe 14 via an extension pipe 16.
A rotary brush 18 and a motor 19 for driving the rotary brush are provided in the suction port 17, and an operation unit 20 is provided in the hand pipe 14.

<First Embodiment> FIG. 3 is a block diagram showing a first embodiment of a control circuit section in a vacuum cleaner according to the present invention. The control circuit unit 9 of the electric vacuum cleaner includes a microcomputer (hereinafter abbreviated as a microcomputer) 21 as a means for controlling the entire circuit, a current detection circuit 22 for detecting a current of the electric blower 5, and an electric blower 5. Phase variable circuit 23 for varying phase firing angle of supplied AC power supply
Storage means 24 for storing the phase firing angle;
Consists of seven.

Next, the operation of the control circuit section 9 of the vacuum cleaner will be described with reference to the flowchart of FIG. First, the storage means 24 of the phase firing angle is set in advance.
The phase firing angle at the time of the last cleaning is stored. The microcomputer 21 operates through the power supply circuit 27 when power is input from an outlet. When the user turns on the "ON" switch of the operation unit 20 to operate the electric blower 5, the microcomputer 21 confirms that the "ON" switch is ON (step S1), and cleans the previous time from the storage unit 24. Of the phase firing angle at the time of performing (Step S)
2). Then, the electric blower 5 is driven through the phase variable circuit 23 so as to start the operation from the phase firing angle, and the operation is started (step S3).

The current detection circuit 22 detects and samples the current signal of the electric blower 5 and sends it to the microcomputer 21 (step S4). The microcomputer 21 checks whether the current signal is a set value (step S5). If it is the set value, the phase firing angle is left as it is, and if it is not the setting value, the phase firing angle is changed so that the current supplied to the electric blower 5 becomes constant (step S6). Specifically, if the current signal is smaller than the set value, the amount of air to be sucked in is small, so that the phase firing angle is advanced to increase the rotation speed of the electric blower 5. If the electric signal is larger than the set value, the amount of air to be sucked is large, so that the phase firing angle is delayed to lower the rotation speed of the electric blower 5.

The microcomputer 21 checks whether the user has turned off the "ON" switch (step 7), and continues to control the phase firing angle until the "ON" switch is turned off (steps S4 to S4). S7). When the "ON" switch is turned off, the microcomputer 21 stops the operation of the electric blower 5 (step S9).

In this way, by storing the optimum phase firing angle at the time of the previous cleaning in the storage means, the operation can be started from the phase firing angle when starting the operation. Optimum input of the electric blower to is obtained from the start of operation. During the operation, since the above-described phase control is performed on the electric blower 5, an optimum input is always obtained.

<Second Embodiment> FIG. 5 is a block diagram showing a second embodiment of the control circuit section in the vacuum cleaner according to the present invention. The control circuit unit 9 is almost the same as that of the first embodiment, except that a reset switch 25 is connected to a microcomputer. When the reset switch 25 is turned on, the microcomputer 21 resets the information stored in the storage unit 24.

If the dust collection amount has changed significantly compared to the previous time, for example, if the dust collection bag 7 has been replaced after the previous cleaning, the phase ignition stored in the storage means as it is as in the first embodiment. The use of a corner may take a long time to find an optimal input of the electric blower 5 for the dust collection amount. Therefore, when the dust collection amount changes greatly from the previous time, the user turns on the reset switch 25 to reset the information stored in the storage unit 24. After the phase firing angle is once returned to the initial state, the electric blower is operated.

The operation of the control circuit section 9 of the second embodiment will be described with reference to the flowchart of FIG. When the user turns on the reset switch 25 and the microcomputer 21 confirms it (step S11), the initial phase firing angle stored in the ROM of the microcomputer 21 is read (step S12). If the reset switch 25 is off, the phase firing angle at the time of the previous cleaning is read from the storage means 24 (step 13). When the user turns on the "on" switch, the microcomputer 21 confirms that the "on" switch is on (step S14), and starts operation of the electric blower 5 at the read phase firing angle (step S1).
5). Hereinafter, Steps 16 to 21 are the same as Steps S4 to S9 described above, and a description thereof will be omitted.

As described above, when the amount of collected dust greatly changes compared to the previous time, the reset switch 25 is turned on, and the operation is started from a predetermined initial phase firing angle. An optimum input of the blower 5 can be obtained in a short time from the start of operation.

<Third Embodiment> FIG. 7 is a block diagram showing a third embodiment of the control circuit unit 9 in the vacuum cleaner according to the present invention. The control circuit unit 9 of the vacuum cleaner includes a microcomputer 21 that controls the entire circuit, a current detection circuit 22 that detects a current of the electric blower 5, and a suction port 1.
The power supply circuit 27 includes a phase variable circuit 26 that varies a phase firing angle of an AC power supply that is supplied to an electric motor 19 that drives the rotating brush 18.

The control circuit 9 controls the rotary brush 18 of the suction opening 17 in accordance with the input load of the vacuum cleaner. Regarding the operation of the control circuit unit 9 of the third embodiment,
This will be described with reference to the flowchart of FIG. When the user turns on the "ON" switch of the operation unit 20, the microcomputer 21 confirms that the "ON" switch is ON (step S31), and starts the operation of the electric blower 5 (step S31). S32). The current detection circuit 22 detects and samples the current signal of the electric blower 5 and
1 (step S33). The microcomputer 21 checks whether the current signal is a set value (Step S34). If it is the set value, the phase firing angle of the rotating brush motor 19 is kept as it is, and if it is outside the set value, the phase firing angle is changed to be the set value (step S35). Specifically, if the current is smaller than the set value, the phase firing angle is advanced to increase the rotation speed of the rotating brush 19. If the current is larger than the set value, the phase firing angle is delayed to reduce the rotation speed of the rotating brush 19.

The microcomputer 21 checks whether the user has turned off the "ON" switch (step 36), and continues to control the phase firing angle until the "ON" switch is turned off (steps S33 to S33). S36). When the "ON" switch is turned off, the microcomputer 21 stops the operation of the electric blower 5 (step S37).

As described above, when the current signal of the electric blower 5 is out of the set value, the rotating brush driving motor 19
Is changed to control the rotation speed of the rotating brush. For example, in the case of a heavy load such as a carpet, the amount of air to be taken in decreases, and the current value of the electric blower 5 decreases. This change is read, the phase firing angle is advanced, and the rotation speed of the rotating brush 18 is increased. When the load is light, such as when lifted, the amount of air to be taken in increases, and the current value of the electric blower 5 increases. This change is read, the phase firing angle is delayed, and the rotation speed of the rotating brush 18 is reduced. Thus, the electric blower 5
The dust collection efficiency can be increased by changing the rotation speed according to the input load.

Another operation of the control circuit section 9 of the third embodiment will be described with reference to the flowchart of FIG. This operation relates to on / off control of the rotating brush. The microcomputer 21 confirms that the “ON” switch is ON (step S41), and the electric blower 5
Is started (step S42). Current detection circuit 2
2 detects the current signal of the electric blower 5, samples it, and sends it to the microcomputer 21 (step S43). This is defined as a first current signal. After the set time lag (Step S44), the second current signal is sampled (Step S45). The microcomputer 21 calculates the difference between the first current signal and the second current signal as described below (step S4).
6). Difference = first current signal−second current signal

This difference indicates the magnitude of the change of the current signal in the set time, that is, the magnitude of the load change of the electric blower 5. The microcomputer 21 determines whether the absolute value of the difference is larger than a set value. If smaller, step S4
Returning to step 3, sampling of the current signal is started again. If it is larger, it is determined whether the difference is positive or negative (step S4).
8) If positive, the rotating brush 18 is rotated; if negative, the rotating brush 18 is stopped. The operation from step 43 to step S51 is repeated until the operation is stopped (step S52) after confirming that the "ON" switch is turned off (step 51).

Consider a case where the suction port body 17 is lifted from a carpet. The current signal of the electric blower 5 changes from small to large, and as shown in step S48, the absolute value of the difference exceeds the set value, and the difference becomes negative. Therefore, as shown in step S49, the microcomputer 21 stops the rotating brush. Conversely, when the suction port 17 is lowered from the raised state to the carpet, the current signal of the electric blower 5 changes from large to small, exceeds the set value as shown in step S48, and the difference becomes positive. Therefore, step S
As indicated by 50, the microcomputer 21 rotates the rotating brush. Thus, when the suction port 17 is separated from the floor without using a micro switch in the suction port 17, the rotating brush 18
Is stopped and returned to the floor, the rotating brush 18 is rotated.

<Fourth Embodiment> FIG. 10 is a block diagram showing a fourth embodiment of the control circuit section in the vacuum cleaner according to the present invention. The control circuit unit 9 of this vacuum cleaner has a structure combining the first embodiment and the third embodiment,
A microcomputer 21 for controlling the entire circuit; a current detection circuit 22 for detecting a current of the electric blower 5; a phase variable circuit 23 for varying a phase firing angle of an AC power supply supplied to the electric blower 5; Storage means 24 for storing the arc angle;
The power supply circuit 27 includes a phase variable circuit 26 for varying the phase firing angle of the AC power supplied to the rotating brush motor 19.

The operation of the control circuit section 9 of the fourth embodiment will be described with reference to the flowchart of FIG. Step S61 to step S64 and step S6
8 to step S70 correspond to steps S1 to S1 of the first embodiment.
The operation is the same as that in step S4 and steps S7 to S9, and the description is omitted.

First, it is checked in step 65 whether the sampled current signal is a set value.
The phase firing angle of the electric blower 5 is changed so that the current signal becomes a set value (step S66). That is, the electric blower 5
The phase firing angle is controlled so that the current supplied to the phase is constant. If the current signal is smaller than the set value, the amount of air to be sucked in is small, so that the phase firing angle is advanced to increase the rotation speed of the electric blower 5. If the electric signal is larger than the set value, the amount of air to be sucked is large, so that the phase firing angle is delayed to lower the rotation speed of the electric blower 5.

Accordingly, the phase firing angle of the rotary brush motor 19 is changed (step S67). That is, if the current is smaller than the set value, the input phase firing angle is advanced to increase the rotation speed of the rotating brush 19. If the current is greater than the set value,
The rotation speed of the rotating brush 19 is reduced by delaying the input phase firing angle. Eventually, as the current signal of the electric blower 5 approaches the set value, the rotation speed of the rotating brush 19 also approaches a predetermined value. The number of rotations of the rotating brush 19 for each current value is set in advance so that the dust collection efficiency is maximized.

For example, in the case of a heavy load such as a carpet, the amount of air to be sucked in decreases, and the current value of the electric blower 5 decreases. This change is read, the firing phase and the firing angle of the electric blower 5 are advanced so that the input becomes constant, and the rotation speed of the electric blower 5 is increased. At the same time, the rotation angle of the rotating brush 18 is increased by advancing the phase firing angle of the rotating brush motor 19. Eventually, when the current supplied to the electric blower 5 reaches a predetermined value, the rotation speed of the rotating brush 18 also returns to the predetermined value. in this way,
The dust collection efficiency can be increased by changing the rotation speed of the rotating brush 18 according to the amount of air to be sucked.

[0035]

[Effect of the Invention] In the invention of claim 1, comprising storage means for storing phase firing angle which the supply current is controlled to be constant to the electric blower based on the output of the current sensing means,
Since the phase firing angle immediately before the end of the previous cleaning is stored,
When the cleaning is performed again, by starting the operation from the phase firing angle at the time of performing the previous cleaning, an optimal input of the electric blower with respect to the dust collection amount can be obtained from the start of the operation.

In the invention according to the second aspect, a reset switch for resetting information stored in the storage means is provided, and when the dust collection amount changes greatly, for example, when the dust collection bag is replaced after the previous cleaning, the reset is performed. Turn on the switch. When the reset switch is turned on, the operation is started from the predetermined initial phase firing angle, so that even if the amount of dust collection changes greatly, the optimal input of the electric blower to the amount of dust collection can be performed for a short time from the start of operation. Can be obtained at

According to the third aspect of the present invention, the current flowing through the electric blower is detected, and the phase firing angle of the electric motor for the rotary brush in the suction port is controlled in accordance with the detected current, so that the amount of air that the input load largely sucks decreases. If the input load is small and the amount of air to be taken in increases, the rotation speed will be reduced,
Dust collection efficiency can be increased.

In the invention according to claim 4, when the absolute value of the difference between the previous measurement value and the current measurement value of the current signal exceeds a set value, the rotation / stop of the rotary brush is switched depending on whether the difference is positive or negative. The rotating brush rotates when it is in contact with the floor surface, and stops when it is separated from the floor surface.If the absolute value of the difference does not exceed the set value, the operating state of the rotating brush is maintained. I do. This makes it possible to stop the rotating brush when the suction body is separated from the floor surface and to rotate the rotating brush when the suction body is returned to the floor surface without using an expensive microswitch in the suction body. Can be lowered.

According to the fifth aspect of the present invention, when the phase firing angle of the electric blower changes from the start of operation, the rotation speed of the rotary brush driving motor is changed accordingly, so that control according to the intake air amount can be performed. , Dust collection efficiency can be increased.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a vacuum cleaner to which the present invention is applied.

FIG. 2 is a perspective view showing a pipe configuration of the vacuum cleaner.

FIG. 3 is a block diagram showing a first embodiment of a control circuit unit in the electric vacuum cleaner according to the present invention.

FIG. 4 is a flowchart illustrating an operation of a control circuit unit according to the first embodiment.

FIG. 5 is a block diagram showing a second embodiment of the control circuit unit in the vacuum cleaner according to the present invention.

FIG. 6 is a flowchart illustrating an operation of a control circuit unit according to the second embodiment.

FIG. 7 is a block diagram showing a third embodiment of the control circuit unit in the vacuum cleaner according to the present invention.

FIG. 8 is a flowchart illustrating an operation of a control circuit unit according to the third embodiment.

FIG. 9 is a flowchart illustrating another operation of the control circuit unit according to the third embodiment.

FIG. 10 is a block diagram showing a fourth embodiment of the control circuit unit in the electric vacuum cleaner according to the present invention.

FIG. 11 is a flowchart illustrating an operation of a control circuit unit according to a fourth embodiment.

FIG. 12 is a block diagram showing an example of a control circuit in a conventional vacuum cleaner.

[Explanation of symbols]

 Reference Signs List 5 electric blower 9 control circuit section 17 suction port body 18 rotating brush 19 rotating brush motor 21 microcomputer 22 current detection circuit 23, 26 phase variable circuit 24 storage means 25 reset switch 27 power supply circuit

Claims (5)

(57) [Claims] An electric blower provided in a main body of a vacuum cleaner, a current detection circuit for detecting a current flowing through the electric blower, and a blower phase for varying a phase firing angle of an AC power supply supplied to the electric blower. A variable circuit, storage means for storing a phase firing angle immediately before the end of the operation of the electric blower, and a control circuit for controlling the phase of the electric blower via the blower phase variable circuit, the control circuit, When starting operation of the electric blower,
It reads the phase firing angle from said storing means, and the phase firing angle of the blower phase shifter, the current based on the output of the detection circuit the blower phase shifter so that the supply current is constant to the electric blower A vacuum cleaner characterized by varying the phase firing angle of the vacuum cleaner. A switch for resetting information stored in the storage means, wherein the control circuit is configured to:
The vacuum cleaner according to claim 1, wherein the operation of the electric blower is started at a predetermined initial phase firing angle without reading the phase firing angle from the storage unit. 3. The configuration according to claim 1 or 2,
For example, a rotary brush provided in the suction port body, and a rotating brush electric motor for driving said rotary brush, and brush phase shifter for varying the phase firing angle of the AC power supply to the motor for the rotary brush A control circuit that controls the phase of the rotating brush via the brush phase variable circuit, wherein the control circuit reduces the rotation speed of the rotating brush when an output of the current detection circuit is larger than a set value. And controlling the phase firing angle of the brush phase variable circuit so as to increase the rotation speed of the rotating brush when the output of the current detection circuit is smaller than a target value. Vacuum cleaner. (4) In addition to the configuration according to (1) or (2),
For example, a rotary brush provided in the suction port body, and a rotating brush electric motor for driving said rotary brush, and brush phase shifter for varying the phase firing angle of the AC power supply to the motor for the rotary brush , Through the brush phase variable circuit
A control circuit for controlling the phase of the rotating brush and controlling the rotation and stop of the rotating brush, wherein the control circuit outputs an output of the current detection circuit from a set value.
If it is large, reduce the rotation speed of the rotating brush.
The phase firing angle is controlled so that the output of the current detection circuit is different from the target value.
If it is smaller, increase the rotation speed of the rotating brush.
The phase shift angle of the brush phase variable circuit is varied to rotate the brush.
The phase control of the switch is performed, and the rotation / stop control calculates the difference between the current value of the current value of the current value of the current detection circuit and the current value of the current value, and when the absolute value of the difference exceeds the set value, the difference If positive, rotating brush
Rotate, if negative, stop the rotating brush, so that when the suction port body is in contact with the floor, the rotating brush rotates, and when away from the floor, the rotating brush stops, and the difference A vacuum cleaner for maintaining an operation state of the rotating brush when an absolute value of the rotation brush does not exceed a set value. 5. An electric blower provided in a vacuum cleaner main body, a current detection circuit for detecting a current flowing through the electric blower, and a blower phase for varying a phase firing angle of an AC power supply supplied to the electric blower. A variable circuit, a rotary brush provided in the suction port body, a rotary brush motor for driving the rotary brush, and a brush phase variable for changing a phase firing angle of an AC power supply supplied to the rotary brush motor. And a control circuit for controlling the phases of the electric blower and the rotary brush via the blower phase variable circuit and the brush phase variable circuit, wherein the control circuit is configured to control the electric blower based on an output of the current detection circuit. supplying current to the variably phase firing angle of the blower phase shifter so that the setting value, when the output is larger than the set value of the current sensing circuit, the rotary brush The phase firing angle is controlled so as to reduce the rotation speed, and when the output of the current detection circuit is smaller than a target value, the phase firing angle of the brush phase variable circuit is changed so as to increase the rotation speed of the rotating brush. An electric vacuum cleaner characterized by the above.